CVE-2026-77270— MCP Atlassian: Arbitrary File Read via Upload Attachment Tools
一分钟漏洞结论
影响对象
sooperset mcp-atlassian
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to 0.22.0, the Jira and Confluence attachment upload tools treat caller-controlled file_path values as trusted server-local paths. The server opens the s
影响版本矩阵 1
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| sooperset | mcp-atlassian | < 0.22.0 |
affected |
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一、 漏洞 CVE-2026-77270 基础信息
漏洞信息
尽管我们使用了先进的大模型技术，但其输出仍可能包含不准确或过时的信息。神龙努力确保数据的准确性，但请您根据实际情况进行核实和判断。
Vulnerability Title
MCP Atlassian: Arbitrary File Read via Upload Attachment Tools
来源: CVE Program / CVE List V5
Vulnerability Description
MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to 0.22.0, the Jira and Confluence attachment upload tools treat caller-controlled file_path values as trusted server-local paths. The server opens the selected file and uploads it to an Atlassian issue or page, allowing an MCP caller with upload access to disclose any file readable by the server process. The advisory traces the vulnerable input and processing flow through confluence_upload_attachment, jira_upload_attachment, file_path, and open(file_path, "rb"), which identify the affected entry points, controls, and code paths. This issue is fixed in version 0.22.0.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
来源: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
来源: CVE Program / CVE List V5
受影响产品
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| sooperset | mcp-atlassian | < 0.22.0 | - |
|
二、漏洞 CVE-2026-77270 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
AI 生成 POC
高级
未找到公开 POC。
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CVE-2026-77270 补丁与修复 (1)
CVE-2026-77270 厂商页面 (1)
CVE-2026-77270 其他参考 (1)
同批安全公告 · sooperset · 2026-09-22 · 共 29 条
| CVE-2026-77244 | 10.0 CRITICAL | [mcp-atlassian] Authentication bypass in HTTP transport: AtlassianOpaqueTokenVerifier acce |
| CVE-2026-77254 | 9.1 CRITICAL | MCP Atlassian: Unauthenticated HTTP MCP requests can use globally configured Jira and Conf |
| CVE-2026-77274 | 8.8 HIGH | MCP Atlassian: SSRF Protection Bypass |
| CVE-2026-77243 | 8.8 HIGH | MCP Atlassian: ENABLED_TOOLS / Toolset authorization bypass |
| CVE-2026-77262 | 8.6 HIGH | MCP Atlassian: Path Traversal / Arbitrary File Read in confluence_upload_attachment MCP to |
| CVE-2026-77248 | 8.6 HIGH | MCP Atlassian: Unauthenticated arbitrary local file read via upload_attachment file_path, |
| CVE-2026-77255 | 8.6 HIGH | MCP Atlassian: Arbitrary File Read & Exfiltration (Confused Deputy) in JIRA update_issue |
| CVE-2026-77271 | 8.3 HIGH | MCP Atlassian: Incomplete path traversal fix allows intra-CWD module overwrite and RCE (by |
| CVE-2026-77247 | 8.3 HIGH | MCP Atlassian: Arbitrary server-local file upload to Jira/Confluence attachments via unres |
| CVE-2026-77260 | 8.3 HIGH | MCP Atlassian: Arbitrary local file READ via unconstrained file_path in upload_attachment |
| CVE-2026-77256 | 8.3 HIGH | MCP Atlassian: OAuth refresh-token backup file is world-readable under default Unix umask |
| CVE-2026-77257 | 8.3 HIGH | MCP Atlassian: HTTP upload tools accept arbitrary server-local file paths |
| CVE-2026-77267 | 8.3 HIGH | mcp-atlassian has an incomplete SSRF remediation |
| CVE-2026-77251 | 8.3 HIGH | MCP Atlassian: JIRA_PROJECTS_FILTER / CONFLUENCE_SPACES_FILTER allow forbidden-project con |
| CVE-2026-77259 | 7.7 HIGH | MCP Atlassian: Arbitrary file read via confluence_upload_attachment allows exfiltration of |
| CVE-2026-77258 | 7.7 HIGH | MCP Atlassian: Arbitrary file read/exfiltration via upload_attachment missing validate_saf |
| CVE-2026-77242 | 7.5 HIGH | MCP Atlassian: Incomplete fix for CVE-2026-27826: DNS rebinding bypasses SSRF validation ( |
| CVE-2026-77246 | 7.4 HIGH | MCP Atlassian: MCP HTTP Client Server-Local File Exfiltration via Unvalidated Attachment U |
| CVE-2026-77253 | 7.1 HIGH | MCP Atlassian: Jira and Confluence attachment upload tools can read arbitrary server-local |
| CVE-2026-77261 | 7.1 HIGH | MCP Atlassian: SSRF redirect protection missing for basic-auth and OAuth authentication br |
显示前 20 条，共 29 条。 查看全部 → →
IV. Related Vulnerabilities
Same product: mcp-atlassian
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CVE-2026-77246
MCP Atlassian: MCP HTTP Client Server-Local File Exfiltratio -
CVE-2026-77248
MCP Atlassian: Unauthenticated arbitrary local file read via -
CVE-2026-77256
MCP Atlassian: OAuth refresh-token backup file is world-read -
CVE-2026-77249
MCP Atlassian: Incomplete fix for CVE-2026-27826: redirect-b -
CVE-2026-77259
MCP Atlassian: Arbitrary file read via confluence_upload_att
Same vendor: sooperset
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CVE-2026-77246
MCP Atlassian: MCP HTTP Client Server-Local File Exfiltratio -
CVE-2026-77248
MCP Atlassian: Unauthenticated arbitrary local file read via -
CVE-2026-77256
MCP Atlassian: OAuth refresh-token backup file is world-read -
CVE-2026-77249
MCP Atlassian: Incomplete fix for CVE-2026-27826: redirect-b -
CVE-2026-77259
MCP Atlassian: Arbitrary file read via confluence_upload_att
Same weakness: CWE-22
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CVE-2026-65829
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CVE-2026-34689
Adobe Connect | Improper Limitation of a Pathname to a Restr -
CVE-2026-77246
MCP Atlassian: MCP HTTP Client Server-Local File Exfiltratio -
CVE-2026-77248
MCP Atlassian: Unauthenticated arbitrary local file read via -
CVE-2026-77259
MCP Atlassian: Arbitrary file read via confluence_upload_att
V. Comments for CVE-2026-77270
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